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20 April 2024 |
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Article overview
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Reverberation mapping of narrow-line Seyfert 1 galaxy I Zwicky 1: black hole mass | | Ying-Ke Huang
; Chen Hu
; Yu-Lin Zhao
; Zhi-Xiang Zhang
; Kai-Xing Lu
; Kai Wang
; Yue Zhang
; Pu Du
; Yan-Rong Li
; Jin-Ming Bai
; Luis C. Ho
; Wei-Hao Bian
; Ye-Fei Yuan
; Jian-Min Wang
; | | Date: |
12 Apr 2019 | | Abstract: | We report results of the first reverberation mapping campaign of I Zwicky 1
during $2014$-$2016$, which showed unambiguous reverberations of the broad
H$eta$ line emission to the varying optical continuum. From analysis using
several methods, we obtain a reverberation lag of $ au_{
m
Heta}=37.2^{+4.5}_{-4.9},$ days. Taking a virial factor of $f_{_{
m
BLR}}=1$, we find a black hole mass of $M_{ullet}=9.30_{-1.38}^{+1.26} imes
10^6 M_{odot}$ from the mean spectra. The accretion rate is estimated to be
$203.9_{-65.8}^{+61.0},L_{
m Edd}c^{-2}$, suggesting a super-Eddington
accretor, where $L_{
m Edd}$ is the Eddington luminosity and $c$ is the speed
of light. By decomposing {it Hubble Space Telescope} images, we find that the
stellar mass of the bulge of its host galaxy is $log (M_{
m bulge}/M_{odot})
=
m 10.92pm 0.07$. This leads to a black hole to bulge mass ratio of $sim
10^{-4}$, which is significantly smaller than that of classical bulges and
elliptical galaxies. After subtracting the host contamination from the observed
luminosity, we find that I Zw 1 follows the empirical $R_{
m BLR}propto
L_{5100}^{1/2}$ relation. | | Source: | arXiv, 1904.6146 | | Services: | Forum | Review | PDF | Favorites | |
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